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Chengdu Ebyte Electronic Technology Co.,Ltd.
37
GPIO17
38
GPIO22
39
GPIO28
40
TDI
41
TDO
42
TCK
43
TMS
4. Recommended Wiring Diagram
Notice:
1. The power supply must be guaranteed to be 2.3V~3.6V. In order to ensure the stable operation of the module, the
RF transmission power will be affected by factors such as the response speed of the LDO. If there is a higher requirement
for the communication distance, it is recommended to select an external LDO with a power supply capacity greater than
600mA. powered by.
2. The RXD/TXD of E103-W03 is connected to the MCU_TXD/MCU_RXD of the external MCU respectively.
3. When powering on, the SOP1 pin needs to be connected to a 10K pull-up resistor, and SOP0 and SOP2 are
connected to a pull-down resistor (the module has already connected SOP0 and SOP2 to the pull-down, so it will not be
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
IO
General IO port
IO
General IO port
IO
General IO port
I
JTAG emulation pin
O
JTAG emulation pin
I
JTAG emulation pin
IO
JTAG emulation pin
E103-W03 User Manual
10
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